Vomiting and diarrhea are protective symptoms that occur when the digestive tract is disturbed. Most dog owners immediately think of parvovirus or parasites or dietary indiscretion. Although there are many specific conditions the symptoms arise from only a few major sources:
Vomiting and diarrhea caused by the pancreas, liver, kidney and Addison’s disease are easily discovered by blood work. Problems with the stomach and intestines seldom, if ever, show up on blood work. Problems in the stomach and intestines need x-rays and sometimes ultrasound to identify them as the source of vomiting and diarrhea. That is why your vet will always recommend blood work and x-rays for your dog if it comes in for vomiting and or diarrhea. It quickly identifies the area of the body most likely responsible for the symptoms. This allows for more targeted treatment.